Analisis Pengaruh Penambahan Booster Biosida Znpt Terhadap Laju Pelepasan Zat Aktif Tembaga Pada Cat Antifouling Kapal Di Salinitas Yang Berbeda

Nusantoro, Probonoto Bintang (2025) Analisis Pengaruh Penambahan Booster Biosida Znpt Terhadap Laju Pelepasan Zat Aktif Tembaga Pada Cat Antifouling Kapal Di Salinitas Yang Berbeda. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Biofouling merupakan akumulasi organisme laut pada permukaan terendam, seperti lambung kapal, yang dapat meningkatkan hambatan hidrodinamik hingga konsumsi bahan bakar sebesar 40%, serta mendorong peningkatan emisi gas rumah kaca. Untuk mengatasi masalah ini, cat antifouling berbasis Cu₂O digunakan karena efektivitasnya sebagai biosida. Namun, pengurangan kandungan tembaga dalam formulasi cat demi alasan lingkungan dapat menurunkan efektivitas antifouling. Penambahan Zinc Pyrithione (ZnPT) sebagai booster biosida menjadi alternatif yang menjanjikan karena diketahui memiliki efek sinergis dengan Cu₂O. Meskipun demikian, pengaruh ZnPT terhadap laju pelepasan tembaga dan hubungannya dengan kondisi lingkungan seperti salinitas masih belum banyak diteliti. Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi konsentrasi ZnPT (1%, 3%, dan 5%) terhadap laju pelepasan tembaga pada dua lingkungan laut berbeda, yakni Selat Madura dengan salinitas 23‰ dan Teluk Prigi dengan salinitas 27‰. Pengujian dilakukan secara in situ selama 4 minggu. Hasil uji X-Ray Fluorescence (XRF) menunjukkan bahwa penambahan ZnPT memengaruhi laju pelepasan tembaga (Cu). Di Selat Madura, penambahan ZnPT sebesar 1% menurunkan laju pelepasan Cu, namun peningkatan konsentrasi hingga 5% justru menyebabkan lonjakan drastis akibat degradasi ZnPT oleh sinar UV. Di Teluk Prigi, penambahan ZnPT hingga 3% meningkatkan laju pelepasan, namun kembali menurun pada konsentrasi 5% akibat kemungkinan aglomerasi ZnPT. Hal ini menunjukkan bahwa efektivitas ZnPT dalam sistem cat dipengaruhi oleh konsentrasi serta kondisi lingkungan perairan. Laju pelepasan tembaga (Cu) di Selat Madura secara umum lebih tinggi dibandingkan Teluk Prigi, terutama pada konsentrasi ZnPT sebesar 5%. Perbedaan ini menunjukkan bahwa karakteristik lingkungan perairan berperan dalam memengaruhi efektivitas pelepasan logam. Meskipun Teluk Prigi memiliki salinitas yang lebih tinggi, laju pelepasan Cu tidak selalu lebih besar, yang mengindikasikan bahwa faktor lain seperti dinamika perairan dan tingkat fotodegradasi dapat berkontribusi.
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Biofouling is the accumulation of marine organisms on submerged surfaces, such as ship hulls, which can increase hydrodynamic drag and fuel consumption by up to 40%, as well as contribute to the rise of greenhouse gas emissions. To address this issue, Cu₂O-based antifouling paints are used due to their effectiveness as biocides. However, reducing copper content in paint formulations for environmental reasons can decrease antifouling effectiveness. The addition of Zinc Pyrithione (ZnPT) as a biocide booster offers a promising alternative, as it is known to have a synergistic effect with Cu₂O. Nevertheless, the effect of ZnPT on copper release rates and its relationship with environmental conditions such as salinity has not been extensively studied. This research aims to evaluate the effect of varying ZnPT concentrations (1%, 3%, and 5%) on copper release rates in two different marine environments, namely the Madura Strait with a salinity of 23‰ and Prigi Bay with a salinity of 27‰. The tests were conducted in situ for 4 weeks. X-Ray Fluorescence (XRF) test results showed that the addition of ZnPT affected the copper (Cu) release rate. In the Madura Strait, the addition of 1% ZnPT reduced the Cu release rate, but increasing the concentration up to 5% caused a drastic spike due to ZnPT degradation by UV light. In Prigi Bay, the addition of ZnPT up to 3% increased the release rate, but it decreased again at a 5% concentration, possibly due to ZnPT agglomeration. This indicates that the effectiveness of ZnPT in the paint system is influenced by both concentration and environmental water conditions. The copper (Cu) release rate in the Madura Strait was generally higher than in Prigi Bay, especially at a ZnPT concentration of 5%. This difference shows that the characteristics of the aquatic environment play a role in influencing the effectiveness of metal release. Although Prigi Bay has a higher salinity, the Cu release rate is not always greater, indicating that other factors such as water dynamics and the level of photodegradation may contribute.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Biofouling, Booster Biosida,Coating, Laju pelepasan, Salinitas Biofouling, Booster Biosida,Coating, Release Rates, Salinities.
Subjects:	T Technology > TP Chemical technology > TP994 Surface active agents.
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Probonoto Bintang Nusantoro
Date Deposited:	31 Jul 2025 07:37
Last Modified:	31 Jul 2025 07:37
URI:	http://repository.its.ac.id/id/eprint/124280

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